hunter



.2 Sheets-Sheet 1.

(No Model.)

J. HUNTER.

WATOH MAKERS LATHB.

' N0. 354,601. Patented Dec. 21., '1886.

(No Model.: 2 sheets-sheet 2.

J. HUNTER.

WATCH MAKBRS LATHB.

No. 354,601. A Patented Dec. 21, 1886.

PATENT Prien.

JOHN HUNTER, OF KINGSTON, ONTARIO, CANADA.

wATcH-MAKeRs LATHE.

SPECIFICATION forming part oi Letters Patent No. 354,601, dated December 21, 1886.

Application filed May 1, 1886. Serial No. 200,859. (No model.) Patented in anada July 9, 1885, No. 22,051.

.To all whom it may concern:, Re it known that I, JOHN HUNTER,'a citizen of Canada, residing at Kingston, in the county of Frontenac and Province of Ontario, Canada, have invented certain new and useful Improvements in Watch-lVIakers7 Lathes, of which the following is a specification. v This invention relates to that class of lathes which are used for drilling, turning, gear-cutting, Ste., and in some particulars it relates to improvements on my drilling .apparatus patented September 1, 1885, No. 325,414.

The object of the invention is, first, to adapt the latheways and' its attachments to. be readily removed from the head-stock; sccondly, to provide means for taking up the slack caused by wearand for readily replacing the bearings when worn; thirdly, to provide means for quickly centering and securingwork in the spindle, and fourthly, to provide a rest midway the ways for work of various sizes, Ste., as will hereinafter appear.4

rIo this end myinvention consistsin the eonstruction and combination of parts forming a watchmakers lathe, hereinafter described and claimed, reference being had to the accompanying drawings, in which- Figure 1 is a rear side elevation of a lathe, showing my invention with the turning-tool carriage in place for service. Fig. 2 is a longitudinal vertical section of the same, partly in elevation, the section of the tool-carriage being on the line :v x, Fig. 5. Fig. 3 is an end view of a steady-rest and a guide or disk to be secured upon the latheway to aid in doing certain kinds of work. Fig. 4 is a longitudinal section of a faceplate for use upon the lathe-spindle, showing jaws for holding work and a self-adjusting center. Fig. 5 is a righthand side View of atoolcarriage for thelathe. Fig, 6 is a side elevation of a gear-cutting device adapted to be fastened upon the tool-car riage shown in Fig. 5. Fig. 7 is an elevation of the center holding-clamp or the tail-stock of the lathe. Fig. 8 shows a Washer with an oblong hole. Fig. 9is an elevation of a clamp to connect the latheway with the head-stock. Fig. 10 represents the feed-screw grooved. Fig. 11 represents in side elevation thesleeve, driving-pulley, and index cylinder for spacing gear-teeth. Fig. 12 represents a tension-screw and thumbnut. Fig. 13 represents the bracket for supportingy the feed-screw and a binding screw-nut. Fig. 14 represents an adjustable pointer for the index.

A represents the head-stock, adapted to be held in a vise, or by any suitable support, and provided with bearings q 2 for the spindle f.

a is a sleeve journaled to revolve upon the spindle f within the bearing q, and provided 6o with a collar, 7L, to bear against the end of bearing q. y e is a pulley firmly secured upon the sleeve a, to be revolved by aband, c, which receives its motion from any suitable drivewheel,-and 65 is directed upon the pulley c by pulleys d;

t' is acylinder firmly fixed upon the spindle f, and perforated in its circumference with circles of holes to serve as an index for spacing gear-teeth in wheels held centrally in the workf ing end of the spindlef.

- b is a pointer carrying'a screw, R, Fig. 14, and tted to slide in the head-stock A,and provided with a binding-screw, H, whereby the pointer may be setto engage its pointing-screw R with the holes of any circle of the index.

O is the spindle-step, fitted to slide in the bearing 2.

I a is a thumb-nut circumferentially grooved to engage a screw, m, and threaded-to receive a screw projecting from the step O. Byturning the thumb-nut a the step may be moved forward or backward. rlhe step O is longitudinally grooved to be held by a screw, m', from being turned by the action of the nut n. The pulley e, being supported in the bearing q by the sleeve c, may revolve continually with-l out revolving the spindlef. By pressing the` step O forward with the nut a the spindle f is moved forward'and the cylinder t' thereon ispgo brought into frictional Contact with the pulley e, whereby the spindle will be revolved with sufficient force for light work.

ris aserew, which may be placed through the rim of the pulley c into the cylinder i, lto

- connect the two positively for hea-Vy work.

s represents oilholes inthe bearing f to oil the sleeve a, and t an oil-hole in bearing 2 to admit oil to the step O.

K is a sleeve-bearing for the forward end of loo the spindle f, tted to be driven closely into the bearing q, and made internally conical at its inner or rear end to fit a eonicalshoulder on the spindle f. .This shoulder-ht should take place when the cylinder i bears against the pulley e to bring the spindle in perfect central line.

k is a collar fixed upon the spindle, and Z is a spring, acting between the bearing K and collar k, to force the spindle into its step,

- thereby centering its rear end and disengaging the cylinder 'i from the pulley e when the nut n is turned back. The latheway F is a single bar provided with a slot, 3, in one side of it. It is connected with the head-stock A by means of a clamp, Y, Figs. 1 and 9, which is split to the holes and provided with a binding-screw, R, whereby it may be firmly iixed while standing at any angle around a cylindrical extension of the bearing q of the headstock A, the said cylindrical extension' being concentric with the spindle and with a screw, S, for binding the clamp Y upon the way F.

V is a set-screw to enter the groove 3, to keep the way from revolving.

Z is the tail-stock, also split at its lower end, and provided with a binding-screw,C., to fasten it upon the way F.

P is the dead-center, and Q is a bindingscrew therefor. j

r represents the tool-carriage, fitted to slide longitudinally upon the way F, and provided with a pointed-screw, T, to engage the groove 3 to keep the carriage from turning around the way F. The carriage is split through its bottom, and provided with a binding-screw, r, whereby it may be clamped with any degree of firmness upon the way F.

4 is a tool.

5 is a tool-post set in the tool-block G,Which is gibbed to slide uponabase-piece, 6, and provided with binding-screws p.

E is a bridge-piece connecting the base 6 with the carriage r', and fitted to slide transversely to the way upon the said carriage and provided with a thumb-screw, w', fitted-to enter a groove in t-he carriage to bind the bridge thereon at any required point.

8 is a pivot-bolt for binding the base 6 upon the bridge E,by means of the nut O,accessible through the bridge.

r is a washer placed between the nut C and the bridge to prevent the nut being unscrewed by turning the tool-block upon the bridge. The lower portion of the base 6 is circularand graduated to degrees, &c., so that the toolblock may be set at any required angle with the axis of the work.

`5 Dis a feed-screw for traversing thek tool- 4block G on its base 6, and the head of the bolt 5 L, and a stud-pin from the way entering the hole pin the bracket. Athumb-nut, J upon the screw J has a bearing rin the bracket M,

and is retained in the bearing by a fixed collar, b. By turning the nut J the screw J is bodily moved, and the carriage 1" is fed either way.

9 is an offset of the bracket M, carrying a screw, t', to enter the groove in the screw J, to prevent the lathe, which is very light, from being twisted by turning the nut J. To form a chuck for holding work,the end of e spindle f is bored to receive the body of thf ringjaws p', and conically counterbored to fit the conical shoulder of the said jaws.

as" is a p in passing through the body ofthe jaws p', and projecting through slots in the spindle f and into an annular groove within a nut, w. z is a sleeve driven firmly onto the spindle f, and secured thereon by a screw, w.A The nut fw is screw-threaded upon the sleeve z, and on being rotated it acts on the pin as to move the jaws p into or out of the tapered end of the spindle, thereby closing or opening the jaws to hold or release work.

y is a finger secured upon the nut w, and projecting therefrom into the path of the screw w to prevent the nut from being accidentally turned off from the sleeve. When the finger rests against the screw w, holes through the nut w are in line with the pin w, so that the latter may be placed or removed through the holes. The steady-rest, Fig. 3, consists of a disk, V, journaled on a stud, e', which is fixed in a clamp, V2, adapted to be secured upon the way F by means of the clamp-screw E2 and a set-screw, T, arranged to fit the groove 3. The circle B on the disk IOO V comes into the line of lathe-centers,and the disk is perforated with holes e2 of various sizes and forms, in which to rest work.

M is aspring-detent fitted to engage notches or teeth in the circumference of the disk V, to hold the same steady at any point where a hole, e, is in the line of centers. Y

H is a face-plate for holding work adapted to be secured on the lathe-spindle f when the IIO sleeve z is removed. The faceplate is provided withjaws 7 for holding work.

E is a center provided with a screw, c', extending through a slot in the hub of the faceplate to be engaged by a spiral spring, D', which is provided with a handle, b, whereby it may be revolved to screw the center E out or in, and to whatever point the center is thus adjust-ed it will bereturned by the spring if the said center be pressed out or in, thus automatically-returning to the working-point.

The gear-cutting device, Fig. 6, consists of a cutter-arbor, x3, journaled in a box, s, and provided with a band-pulley, s. The box has a bracket, A3, and screws it, by which it is mounted and secured on the toolblock G when the tool-post 5 is removed. The gear to be cutis to be held in the jaws r of the spindle f, the belt c is taken 0H, the screw r is put in place, as in Fig. 2, the index-pointer b is to be set to register with the required circle of holes on the graduated cylinder i, and then, by means of the screws D and J, the cutter may be moved as required to cut the teeth,one at a time, as usual. Thus,by means of the various appliances hereinbefore described, this lathe is adapted to do all kinds of watchmakerslathe-work.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, in a lathe, of the headstock A, provided with the bearing q,tl1e sleeve a, iitted to revolvein the said bearing andprovided with the collar h, the pulley fitted tightly upon the sleeve a, and the spindle f, passing freely through thesaid pulley to revolve in the said sleeve, substantially as shown and described.

y2. The combination of the head-stock A, provided with the bearing g, the sleeve a, journaled therein,the pulley e, tightly fixed on the said sleeve, the spindle f, passing freely through the said pulley and journaled in the sleeve, the graduated cylinder i, lixed upon the spindle, and the screw r, fitted to connect the said cylinder and pulley.`

3. The combination of the head-stock A, provided with spindle-bearings, the slotted spindle-step O, having a screw projecting from its rear'end and fitted into one of the said spindle-bearings, the eircumferentially grooved thumb-nut n, fitted into the said bearing and engaging the said projecting screw, the screw m', litted toengage the groove in the said step, and the screw m, fitted to engage the groove in the said thumb-nut.

Ll. The combination of the head-stock A, having bearings q and 2, the sleeve K, `fitting tightly in bearing q and bored cylindrically through its body and bored conically at its rear end, the spindle f, having a cylindrical portion to fit easily in the said cylindrical bore, and a conical shoulder to lit the conical portion of the said bore, and a step for the rear end of the spindle.

5. The combination of the head-stock A, having bearings q and'2, the sleeve K, conically bored, the spindle f, having a conical shoulder tted to the said conical bore, the screwstep O, and the screw-nut n, tted in the bearing 2, and the screws m and m.

(i. The spindle f, the cylinder i, fixed thereon and perforated with holes in circles in its circumference,tl1c pointer b, tted to slidein the head-stock A, the binding-screw H, and the index-screw R.

7. The combination of the head-stock A, provided with the bearing q, having a circumierentially-cylindrical extension, the bracket Y, fitted upon the said extension and provided' with the clamp and screw R', and the way F,

fitted into the clamp Y.

8. The combination of the clamp Y, perforated and split at its lower end, the bindingscrew S, the pointed set-screw V, the cylindrical way F, fitting the said perforation and provided with a longitudinal groove, 3, the

and journaled tail-stock Z, tted upon the way F and split at its lower end, and the binding-screw C.

9. The combination of the grooved cylindrical latheway F, the carriage r', iitted upon the said way and split in its under side, the clamping-screw r2, and the set-screw T, fitted to the groove in the way.

10. The combination of the carriage r', the bridge E, fitted thereon, the binding-screw x',

-the base 6, the pivot-bolt 8, the nut C', accessible through the bridge, the washer r3, and the tool-block G, fitted to slide on the base 6.

11. The combination o`f the bridge E, the base 6, the pivot-bolt 8, connecting the base and bridge, the tool-block G, fitted to slide on the said base, and the feed-screw D, threaded through the pivot-bolt 8.

12. The combination of the horizontallyperforated carriage r', the binding-screw O', entering said perforation transversely thereto, the feed-rodJ, fitted to pass freely through the said perforation, the bracket M, and the screw-nut J upon the rod J, journaled in the bracket M, and provided with a removable collar, Z1.

18. The groovedfeed-rod J, the bracket M, having the offset 9, the screw-nut J journaled in the bracket M, and provided withthe collar b', and the screw t in the offset 9, fitted to engage the groove in the feed-rod J.

14. The combination of the spindle f, bored and slotted in its end, the spring-jaws 19'., having a conical shoulder and a body to fit within body of the jaws and projecting through the slot of the spindle, the sleeve z, secured upon the Yspindle f, and the nut w, screw-threaded upon the said sleeve and internally annularly grooved to receive the ends of the pin x2.

15.' The combination of the bored and slotted spindle f, the jaws p,the pin m2, the sleeve the spindle, the pin m2, passing through the Ioo i a, fixed on the spindle, the screw -w in the sleeve, the perforated nut w, screw-threaded upon the sleeve and engaging the pin x2, and the finger y, extending from the nut fw across the path of screw w.

16. The combination of latheway F, the bracket V2, fitted thereto, the binding-screw E2, the set-screw TZ, the disk V, perforated with holes in a circle coinciding` with the line of centers of the lathe, and provided with notches in its circumference corresponding with the said holes, each, respectively, when in line of centers, and the spring-detent M.

17. The combination of the face-plate H, having a slotted hub fitted tothe spindle of the lathe, the center E', provided with the projecting screw c', and the spiral spring D', provided with the handle b, all substantially as shown and described, forthe purpose specied.

JOHN HUNTER. Witnesses:

THos, MoADAM, JN0. A. McMAHoN. ,c

IIO 

